#!/bin/bash

if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
    set -x
fi
set -eu
set -o pipefail

[ -n "$ARCH" ]
[ -n "$TARGET_ROOT" ]

if [[ "amd64 x86_64" =~ "$ARCH" ]]; then
    ARCH="x86_64"
    DIB_CLOUD_IMAGES=${DIB_CLOUD_IMAGES:-http://cloud.centos.org/centos/7/images}
elif [[ "arm64 aarch64" =~ "$ARCH" ]]; then
    ARCH="aarch64"
    DIB_CLOUD_IMAGES=${DIB_CLOUD_IMAGES:-http://cloud.centos.org/altarch/7/images/aarch64}
elif [[ "ppc64le" =~ "$ARCH" ]]; then
    DIB_CLOUD_IMAGES=${DIB_CLOUD_IMAGES:-http://cloud.centos.org/altarch/7/images/ppc64le}
else
    echo 'centos7 root element only support the x86_64, aarch64 and ppc64le values for $ARCH'
    exit 1
fi

DIB_LOCAL_IMAGE=${DIB_LOCAL_IMAGE:-}

if [ -n "$DIB_LOCAL_IMAGE" ]; then
    IMAGE_LOCATION=$DIB_LOCAL_IMAGE
    # No need to copy a local image into the cache directory, so just specify
    # the cached path as the original path.
    CACHED_IMAGE=$IMAGE_LOCATION
    BASE_IMAGE_FILE=$(basename $DIB_LOCAL_IMAGE)
    BASE_IMAGE_TAR=$BASE_IMAGE_FILE.tgz
else
    DIB_CENTOS7_CLOUD_RELEASE=${DIB_CENTOS7_CLOUD_RELEASE:-GenericCloud}
    BASE_IMAGE_FILE=${BASE_IMAGE_FILE:-CentOS-7-${ARCH}-$DIB_CENTOS7_CLOUD_RELEASE.qcow2.xz}
    BASE_IMAGE_TAR=$BASE_IMAGE_FILE.tgz
    IMAGE_LOCATION=$DIB_CLOUD_IMAGES/$BASE_IMAGE_FILE
    CACHED_IMAGE=$DIB_IMAGE_CACHE/$BASE_IMAGE_FILE
fi

$TMP_HOOKS_PATH/bin/extract-image $BASE_IMAGE_FILE $BASE_IMAGE_TAR $IMAGE_LOCATION $CACHED_IMAGE
